Apparatus and method for correcting white line of ink-jet printer

Abstract

An apparatus to correct a white line of an ink-jet printer and a method to control the apparatus including driving a pickup roller when a printing command is inputted to pickup a paper; judging whether the leading end of the paper enters or not using a paper-detection sensor; judging a corresponding overfeeding amount and overfeeding position in accordance with the type of the paper; sequentially implementing the printing and feeding in accordance with a preset printing width; and implementing the printing using dummy nozzles which are not used in the printing of the sequential implementing operation, in such a way that the printing is performed for the overfeeding amount judged in the judging operation as well as for the printing width in the sequential implementing operation, when the line positioned just before the overfeeding position judged in the judging operation is printed. When the overfeeding position of the paper is printed, the dummy nozzles are used and when the lines following the overfeeding position are printed, the nozzles located in the area retreated to the extent of the width of the area of the dummy nozzles are used. Thus, it is possible to prevent a white line from being produced due to the overfeeding.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of Korean Application No. 2003-1416, filed Jan. 9, 2003, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an apparatus that corrects a white line of an ink jet printer and a method of controlling the apparatus, and in particular, to an apparatus that corrects a white line of an ink-jet printer. The apparatus is capable of preventing a white line from being produced by using dummy nozzles when overfeeding of a recording paper causes a release of tension of the paper in a mechanical mechanism, in which a pickup roller loads the recording paper and a feed roller feeds the paper. The release of tension of the paper arises when the tail end of the paper passes out of the pickup roller. The present invention further relates to a method for controlling the appa...

AI Technical Summary

Benefits of technology

[0012]Accordingly, an aspect of the present invention is to provide an apparatus that corrects a white line of an ink-jet printer. The white line is produced when the vertical component of feeding force of a pickup roller is lost due to release of tension of a paper at the moment the tail end of the paper passes out of the pickup roller. The apparatus is capable of preventing the white line from being produced when the ink-jet printer implements the printing so that the quality of printed image can be enhanced. A further aspect of the present invention is to provide a method of controlling the apparatus.

Problems solved by technology

However, there is a problem in that when the tail end of the paper passes out of the pickup roller 21, while the paper is being fed in a preset feeding amount, release of tension of the paper is caused, and due to the release of tension, the vertical component of feeding force exerted by the pickup roller 21 is lost, as a result of which the paper is overfed so as to exceed the preset feeding amount, and a white line is produced in the final printed paper.

Therefore, there is a problem in that a white line is produced on the printed paper to the extent of 60 and thus deteriorates the quality printed image.

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